A few questions concerning preTurbo water injection

[parmas]

Originally Posted by mrx79

Hi,
did some tests with WM50/50 (by weight) today. But not very much luck.
Car is still slower and makes less power with WI activated.

My parameters are:
max. Boost: 1,25bar (with WI boost drops to 1,1bar)
WI activation at 0,6bar
same ignition advance (aprox. 22.5btdc under boost)
played a bit with afr, but almost no difference between 0,8 and 0,85 lambda.

max. tq /wo WI = 355Nm
max. tq /w WI same AFR =323Nm
max. tq /w WI -5% AFR = 331Nm

I'am still fear that my nozzle is just too big (for my conservative tune/boost levels) as i have a water-to-fuel ratio or 60% at activation boost pressure and it will go down to still 23% at 8k redline.

As a guideline i inject 350ccm of WM mixture on my 1,6L engine.

Anyone any more ideas or should i try a smaller nozzle?!

You cannot make more power with water/meth injection especially because you are leaving ignition advance the same!

With water + meth injection there is need for ignition advance due to slower burn rate. So to compare you need to max your ignition advance without water/meth injection until you see some power/torque go down and back to 2-3 Degrees for safety then turn on water/meth injection, set 15% if you are intercooled or 25% if you are non-intercooled, put car on dyno, increase advance after 2psi boost where water injection begins. Keep increasing ignition advance until you see a drop in power and again retard 2-3 Degrees. Now compare and you are doing more power and torque with water injection on !

What Air Temps are you seeing?